Spatial and seasonal patterns in water quality in an embayment-mainstem reach of the tidal freshwater Potomac River, USA: a multiyear study.

Environmental Monitoring and Assessment
R Christian JonesElaine Schaeffer

Abstract

Spatial and temporal patterns in water quality were studied for seven years within an embayment-river mainstem area of the tidal freshwater Potomac River. The purpose of this paper is to determine the important components of spatial and temporal variation in water quality in this study area to facilitate an understanding of management impacts and allow the most effective use of future monitoring resources. The study area received treated sewage effluent and freshwater inflow from direct tributary inputs into the shallow embayment as well as upriver sources in the mainstem. Depth variations were determined to be detectable, but minimal due mainly to the influence of tidal mixing. Results of principal component analysis of two independent water quality datasets revealed clear spatial and seasonal patterns. Interannual variation was generally minimal despite substantial variations in tributary and mainstem discharge among years. Since both spatial and seasonal components were important, data were segmented by season to best determine the spatial pattern. A clear difference was found between a set of stations located within one embayment (Gunston Cove) and a second set in the nearby Potomac mainstem. Parameters most highly correlat...Continue Reading

References

Nov 9, 1974·Lancet·F E HyttenA M Thomson
Feb 1, 1995·American Journal of Physical Anthropology·G BarbujaniN L Oden
Oct 1, 2005·Marine Pollution Bulletin·Valentina G Caccia, Joseph N Boyer

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Citations

Jun 30, 2011·Environmental Monitoring and Assessment·Richard T Kraus, R Christian Jones
Oct 22, 2011·Environmental Monitoring and Assessment·Thomas K WildingKevin J Collier
Sep 20, 2012·Environmental Monitoring and Assessment·Gurpal S ToorCraig D Stanley
Sep 9, 2010·Proceedings of the National Academy of Sciences of the United States of America·Henry A Ruhl, Nancy B Rybicki

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